This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A new fluorogenic method for the selective and sensitive determination of chromium(VI) in acidic water using rhodamine B hydrazide was developed. This method was based on the oxidation of non-fluorescent rhodamine B hydrazide by potassium dichromate in acidic aqueous conditions to give rhodamine B, which was highly fluorescent, as a product. With the optimum condition described, the fluorescence enhancement at 585nm was linearly related to the concentration of chromium(VI) in the range of 5.0×10^-^8 to 2.0×10^-^6molL^-^1 (2.60-104ngmL^-^1) with a correlation coefficient of R^2=0.9993 (n=18) and a detection limit of 5.5×10^-^9molL^-^1 (0.29ngmL^-^1). The R.S.D. was 2.2% (n=5). The proposed method was also applied to the determination of chromium(VI) in drinking water, river water and synthetic samples.